Furnace



2 SheetsSheet 1.

(No Model.)

G. W. MAREMBEGK;

AIR HEATING FURNACE.

Patented-Dec. 25, 1883.

@Wa 71mm (No Model.) 2 Sheets-Sheet 2.

G. W MAREMBEGK.

AIR HEATING FURNACE. N0. 290,902. PatentedDeGVZB, 1883.

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GEORGE vV. MAREMBECK, OF PHILADELPHIA, PENNSYLVANIA,

AIR-HEATING FURNACE.

SPECIFICATION forming part of Letters Patent No. 290,902, dated December25, 1883.

' Applicagion filed June 11, 1883. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE W. LIAREM- BECK, a citizen of the UnitedStates, and a resident of Philadelphia, Pennsylvania, have inventedcertain Improvements in Air-Heating Furnaces, of which the following isa specification.

The main object of my invention is to so construct an air-heatingfurnace as to insure extended air-heating surfaces without undulyincreasing the height of the structure.

The invention also comprises minor features of construction with theview of controlling the combustion and readily cleaning the fines.

In the accompanying drawings, Figure 1 is a longitudinal section of myimproved furnace; Fig. 2, a transverse section on the line 1 2; Fig. 3,a transverse section on the line 3 4, and Fig. 4 a sectional plan on theline 5 6.

A is the outer casing of the furnace, inclosing the air-heating chamber13. This casing may be of sheet metal or of brick, and is furnished withthe usual openings, at, for the entrance of cold air, and withbranches 1) for the escape of the heated air.

\Vithin the chamber B is suitably supported the cylindrical casing D ofthe combustionchamber F, and within the latter is a cylindrical casing,G, the chamber Hwithin which receives a supply of cold air from achamber, K, at-the rear of the furnace, and discharges the heated airinto a chamber, J, at the front of the same, the air being conveyed fromthe latter chamber by suitable pipes. The annular combustion-chambercommunicates with the fire-place M, and with an exit-pipe, N, extendinglongitudinally through the chamber H, and communicating with an adjacentchimney, longitudinal deflecting-plates d in the chamber F causing theproducts of combustion to take a circuitous course in their passage fromthe fire-place to the outlet, so as to be brought into contact with allportions of the casings D and G. The chamber H is contracted above thefire-place,in order to permit the free flow of the products ofcombustion into the chamber F, and to provide for direct draft. Thedeflecting-plates d have near their front ends valves f, on openingwhich the products of combustion are at liberty 'to pass directlyupward, so as to enter the pipe N. Thefront end of the pipe N passesthrough the casing of the chamber J and has a detachable cap, 9, onremoving which access may be had to the pipe for the removal of soottherefrom, and the front plate, I, of the heater has doors h in linewith the plates d, for a similar purpose, and also for permitting accessto the valves f when it becomes necessary to operate the latter for thepurpose of controlling the draft.

It will be noticed that in the above heater two volumes of air are beingsimultaneously heated-one by contact with the outer casing of thecombustion-chamber, and the other by 65 contact with the inner casing ofthe same and with the exit-pipe N.

In a furnace constructed as shown heating surface may be extendedindefinitely by in creasing the length of the structurewithoutincreasing its height or width an advantageous feature, as theapartments in which heaters are usually located are frequently low andnarrow, but are. generally so long that longitudinal extension of thestructure is not objectionable. Moreover, economy is insured, as thesame front and rear castings can be used in building heaters ofdifferent sizes.

The contracted portion of the casing G of the combustionchamber may beprovided with blocks or slabs of fire-brick to prevent warping of thesame by the intense heat to which it is subjected.

I claim as my invention- 1. The combination of the fire-place, the innerand outer heating-chambers, H and B, the annular combustion-chamber Fbetween the two, the exit-pipe N, and longitudinal deflecting-plates din said combustion-chamber, as set forth.

2. The combination of the outer casing, A, and the end platesinclosingthe heating-chamber B, with the fire-place M, the casing D,inclosing the chamber F, and the casing G, inclosing the heating-chamberH, said casing G having abovethe fire-place an offset forming acombustion-chamber communicating with the front end of the chamber F, asset forth.

3. The combination of the fire-place, the inner and outerheating-chambers, H and B, the mo exit-pipeN, and the annulareombustion-ehain- In testimony whereof I have signed my name ber F,having deflecting-plates d, with valves to this specification in thepresence of two sub- IO f, as set forth. scribing Witnesses.

4:. The combination ofthe fire- )lace, the in- 7 5 ner and outerheating-chambers, H and B, the MAREMBDOI annular combustion-chamber F,having (16- Witnesses: fleeting-plates d, and the front plate, P, hav- JOHN E. PARKER,

ing doors h in line with said plates, as set forth. 1 HARRY SMITH.

